On Billy Gliddens car I know for a fact that the lines were molded into the hood and the fogged into the scoop, as far as a horsepower advantage? Who knows.
1968 Barracuda 360/727 11.20 @ 121 mph 421 rwhp 1985 Harley Sportster Bobber 2006 Ram 2500 sport - The Cudahlr